|Applicants:||OMG BORCHERS GMBH [DE/DE]; Berghausener Straße 100 40764 Langenfeld (DE)|
|Inventors:||SIMPSON, Neil John; (DE).
DESCHAMPS, Carina; (DE).
OBERSTE, Dietmar; (DE)
|Agent:||EISENFÜHR SPEISER PATENTANWÄLTE RECHTSANWÄLTE PARTGMBB; Postfach 10 60 78 28060 Bremen (DE)|
|Title||(EN) ENCAPSULATED ACCELERATORS FOR COATINGS
(FR) ACCÉLÉRATEURS ENCAPSULÉS POUR REVÊTEMENTS
(EN)The invention relates to an organometallic catalyst that has been encapsulated to create a curing system for water-borne 2K polyurethane coatings. The catalyst is released from the capsules upon film-formation, and without further stimuli, to enable a wide range of application methods. Separation of the catalyst from the coating formulation enables beneficial properties prior to release and activation, such as longer pot-life upon mixing of reactive components, prevention of substantial hydrolysis during storage and use leading to longer shelf life, and the minimization of foam creation.
Encapsulated Accelerators for Coatings
Field of the Invention
 A non-tin organometallic catalyst has been encapsulated in order to create a curing system for water-borne 2K polyurethane systems. The capsules release the catalyst upon film-formation, and without further stimuli, to enable a wide range of application methods. By separating the catalyst from the paint formulation we can enable beneficial properties prior to release and activation, such as longer pot-life upon mixing of reactive components, prevent hydrolysis during storage and use and to minimise the creation of foam. This invention enables non-toxic, tin-free 2k PU formulations with a wide range of application methods and longer pot-life and shelf-life for paint manufacturers.